Antenna device and method for manufacturing antenna device
AssigneeMitsumi Electric Co., Ltd.
InventorRyutaro Miura
Life of this patent
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Abstract
An antenna device mounted to an automobile includes an antenna component and an amplifier board provided with an amplifier to amplify signals received by the antenna component. The antenna component includes a metal plate and a resonance point adjusting coil having a first end connected to the metal plate, the resonance point adjusting coil being connected to an input terminal of the amplifier board at the first end via the metal plate. The impedance of the antenna component is adjustable by the mount angle of the resonance point adjusting coil to the antenna component.
Claims4
A shark fin type antenna device mounted to an automobile, comprising:
- an antenna component;
- and
- an amplifier board provided with an amplifier to amplify signals received by the antenna component,
- wherein the antenna component comprises a metal plate and a resonance point adjusting coil mounted to the metal plate, the resonance point adjusting coil having a first end connected to the metal plate and a second end that is open, and the resonance point adjusting coil being connected to an input terminal of the amplifier board at the first end via the metal plate,
- wherein an impedance of the antenna component changes in accordance with a selection of a mount angle of the resonance point adjusting coil mounted to the metal plate, and
- wherein the mount angle of the resonance point adjusting coil is fixed in the shark fin type antenna device after the selection of the mount angle such that the resonance point adjusting coil cannot be tiltably adjusted.
Dependencies are inferred from the claim text.